[110] | 1 | /* |
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| 2 | * $Id: Parameters.cpp 146 2011-02-01 20:57:54Z rosiere $ |
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| 3 | * |
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| 4 | * [ Description ] |
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| 5 | * |
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| 6 | */ |
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| 7 | |
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| 8 | #include "Behavioural/Core/Multi_Front_end/Front_end/Prediction_unit/Direction/Meta_Predictor/Two_Level_Branch_Predictor/include/Parameters.h" |
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[111] | 9 | #include "Common/include/BitManipulation.h" |
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[110] | 10 | |
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| 11 | namespace morpheo { |
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| 12 | namespace behavioural { |
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| 13 | namespace core { |
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| 14 | namespace multi_front_end { |
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| 15 | namespace front_end { |
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| 16 | namespace prediction_unit { |
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| 17 | namespace direction { |
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| 18 | namespace meta_predictor { |
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| 19 | namespace two_level_branch_predictor { |
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| 20 | |
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| 21 | |
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| 22 | #undef FUNCTION |
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| 23 | #define FUNCTION "Two_Level_Branch_Predictor::Parameters" |
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[146] | 24 | Parameters::Parameters (uint32_t nb_inst_predict , |
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| 25 | uint32_t nb_inst_update , |
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| 26 | uint32_t size_address , |
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| 27 | bool have_bht , |
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| 28 | uint32_t bht_size_shifter , |
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| 29 | uint32_t bht_nb_shifter , |
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| 30 | bool have_pht , |
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| 31 | uint32_t pht_size_counter , |
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| 32 | uint32_t pht_nb_counter , |
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| 33 | uint32_t pht_size_address_share, |
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| 34 | Tpht_scheme_t pht_scheme , |
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| 35 | bool update_on_prediction , |
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| 36 | bool is_toplevel) |
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[110] | 37 | { |
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| 38 | log_begin(Two_Level_Branch_Predictor,FUNCTION); |
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| 39 | |
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[111] | 40 | _nb_inst_predict = nb_inst_predict ; |
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| 41 | _nb_inst_update = nb_inst_update ; |
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| 42 | _size_address = size_address ; |
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| 43 | _have_bht = have_bht ; |
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| 44 | _bht_size_shifter = (have_bht)?(bht_size_shifter):0; |
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| 45 | _bht_nb_shifter = (have_bht)?(bht_nb_shifter ):0; |
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| 46 | _have_pht = have_pht ; |
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[112] | 47 | _pht_size_counter = (have_pht)?(pht_size_counter):0; |
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| 48 | _pht_nb_counter = (have_pht)?(pht_nb_counter ):0; |
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[111] | 49 | _pht_size_address_share = (have_bht and have_pht)?(pht_size_address_share):0; |
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[146] | 50 | _pht_scheme = pht_scheme ; |
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[111] | 51 | _update_on_prediction = update_on_prediction ; |
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| 52 | |
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| 53 | _bht_size_address = (_have_bht)?log2(_bht_nb_shifter):0; |
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| 54 | _pht_size_address = (_have_pht)?log2(_pht_nb_counter):0; |
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| 55 | |
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| 56 | test(); |
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[110] | 57 | |
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[112] | 58 | // history to update_prediction_table : |
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| 59 | // MSB : pht_history |
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| 60 | // LSB : bht_history |
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[115] | 61 | log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION," * _have_bht : %d",_have_bht ); |
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| 62 | log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION," * _bht_size_shifter : %d",_bht_size_shifter); |
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| 63 | log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION," * _bht_nb_shifter : %d",_bht_nb_shifter ); |
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| 64 | |
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| 65 | log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION," * _have_pht : %d",_have_pht ); |
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| 66 | log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION," * _pht_size_counter : %d",_pht_size_counter); |
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| 67 | log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION," * _pht_nb_counter : %d",_pht_nb_counter ); |
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[112] | 68 | |
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[111] | 69 | _size_history = _bht_size_shifter + _pht_size_counter; |
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| 70 | _bht_history_mask = gen_mask<Thistory_t>(_bht_size_shifter); |
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[115] | 71 | _bht_history_shift = 0; |
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[111] | 72 | _pht_history_mask = gen_mask<Thistory_t>(_pht_size_counter); |
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[115] | 73 | _pht_history_shift = _bht_size_shifter; |
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[111] | 74 | |
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| 75 | log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION," * _size_history : %d",_size_history ); |
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[124] | 76 | log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION," * _bht_history_mask : 0x%llx",_bht_history_mask ); |
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| 77 | log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION," * _bht_history_shift : %lld",_bht_history_shift ); |
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| 78 | log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION," * _pht_history_mask : 0x%llx",_pht_history_mask ); |
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| 79 | log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION," * _pht_history_shift : %lld",_pht_history_shift ); |
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[111] | 80 | |
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[115] | 81 | _bht_init_take = static_cast<Thistory_t>(-1)&_bht_history_mask; |
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[112] | 82 | _bht_init_ntake = 0; |
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| 83 | _pht_init_take = (1<<(_pht_size_counter-1)); // size = 4 : 1000/2 |
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| 84 | _pht_init_ntake = _pht_init_take-1; // size = 4 : 0111/2 |
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| 85 | |
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[124] | 86 | log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION," * _bht_init_take : 0x%llx",_bht_init_take ); |
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| 87 | log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION," * _bht_init_ntake : 0x%llx",_bht_init_ntake); |
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| 88 | log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION," * _pht_init_take : 0x%llx",_pht_init_take ); |
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| 89 | log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION," * _pht_init_ntake : 0x%llx",_pht_init_ntake); |
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[112] | 90 | |
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[111] | 91 | if (_have_bht) |
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[110] | 92 | { |
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[111] | 93 | _bht_address_mask = gen_mask<Taddress_t>(_bht_size_address); |
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| 94 | |
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| 95 | log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION," * _bht_address_mask : 0x%x",_bht_address_mask ); |
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[110] | 96 | } |
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| 97 | |
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[111] | 98 | if (_have_pht) |
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| 99 | { |
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| 100 | _pht_counter_max = (1<<_pht_size_counter)-1; |
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[146] | 101 | _pht_threshold_up = (1<<(_pht_size_counter-1))+1; |
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| 102 | _pht_threshold_down = (1<<(_pht_size_counter-1))-1; |
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| 103 | |
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[115] | 104 | _pht_size_bank = (_have_bht)?(1<<_bht_size_shifter):1; |
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| 105 | _pht_nb_bank = _pht_nb_counter / _pht_size_bank; |
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[111] | 106 | |
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[115] | 107 | // -------->| |
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| 108 | // +---+ | |
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| 109 | // | | |---> |
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| 110 | // ---> --->| |
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| 111 | // | | | |
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| 112 | // +---+ |
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| 113 | // |
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| 114 | |
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[111] | 115 | _pht_address_share_mask = gen_mask<Taddress_t>(_pht_size_address_share); |
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[115] | 116 | _pht_address_share_shift = _bht_size_shifter-_pht_size_address_share; |
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[111] | 117 | _pht_address_bank_mask = gen_mask<Taddress_t>(log2(_pht_nb_bank)); |
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[115] | 118 | _pht_address_bank_shift = _pht_size_address_share; |
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[111] | 119 | |
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| 120 | log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION," * _pht_nb_bank : %d" ,_pht_nb_bank ); |
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| 121 | log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION," * _pht_size_bank : %d" ,_pht_size_bank ); |
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| 122 | log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION," * _pht_address_share_mask : 0x%x",_pht_address_share_mask ); |
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[115] | 123 | log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION," * _pht_address_share_shift : %d" ,_pht_address_share_shift ); |
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[111] | 124 | log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION," * _pht_address_bank_mask : 0x%x",_pht_address_bank_mask ); |
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[115] | 125 | log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION," * _pht_address_bank_shift : %d" ,_pht_address_bank_shift ); |
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[111] | 126 | } |
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| 127 | |
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| 128 | if (is_toplevel) |
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| 129 | copy(); |
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| 130 | |
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[110] | 131 | log_end(Two_Level_Branch_Predictor,FUNCTION); |
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| 132 | }; |
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| 133 | |
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| 134 | // #undef FUNCTION |
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| 135 | // #define FUNCTION "Two_Level_Branch_Predictor::Parameters (copy)" |
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| 136 | // Parameters::Parameters (Parameters & param) |
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| 137 | // { |
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| 138 | // log_begin(Two_Level_Branch_Predictor,FUNCTION); |
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| 139 | // test(); |
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| 140 | // log_end(Two_Level_Branch_Predictor,FUNCTION); |
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| 141 | // }; |
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| 142 | |
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| 143 | #undef FUNCTION |
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| 144 | #define FUNCTION "Two_Level_Branch_Predictor::~Parameters" |
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| 145 | Parameters::~Parameters (void) |
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| 146 | { |
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| 147 | log_begin(Two_Level_Branch_Predictor,FUNCTION); |
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| 148 | log_end(Two_Level_Branch_Predictor,FUNCTION); |
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| 149 | }; |
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| 150 | |
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| 151 | #undef FUNCTION |
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| 152 | #define FUNCTION "Two_Level_Branch_Predictor::copy" |
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| 153 | void Parameters::copy (void) |
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| 154 | { |
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| 155 | log_begin(Two_Level_Branch_Predictor,FUNCTION); |
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| 156 | log_end(Two_Level_Branch_Predictor,FUNCTION); |
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| 157 | }; |
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| 158 | |
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| 159 | }; // end namespace two_level_branch_predictor |
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| 160 | }; // end namespace meta_predictor |
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| 161 | }; // end namespace direction |
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| 162 | }; // end namespace prediction_unit |
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| 163 | }; // end namespace front_end |
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| 164 | }; // end namespace multi_front_end |
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| 165 | }; // end namespace core |
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| 166 | |
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| 167 | }; // end namespace behavioural |
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| 168 | }; // end namespace morpheo |
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